package com.itheima.reggie.config;

import com.itheima.reggie.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    /*
     * 设置静态资源映射
     * @param registry
     */
    @Override
    protected void  addResourceHandlers (ResourceHandlerRegistry registry){
        //super.addResourceHandlers(registry);
        log.info("开始进行静态资源映射");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /**
     * 扩展mvc框架的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器");

        //创建消息转换器，将controller的数据转换再传给页面
        MappingJackson2HttpMessageConverter messageConverter= new MappingJackson2HttpMessageConverter();
        // 设置对象转换器，底层使用Jackson将java转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架转换器容器集合中
        converters.add(0,messageConverter);

    }
}
